Reworked a lot of stuff to do with Smelting

src/main/java/com/gmail/nossr50/util/skills/SmeltingTracker.java

@@ -0,0 +1,65 @@
+package com.gmail.nossr50.util.skills;
+
+import com.gmail.nossr50.datatypes.skills.PrimarySkillType;
+import com.gmail.nossr50.mcMMO;
+import com.gmail.nossr50.skills.smelting.Smelting;
+import com.gmail.nossr50.util.EventUtils;
+import com.gmail.nossr50.util.Permissions;
+import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.block.Furnace;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.FurnaceInventory;
+import org.bukkit.inventory.Inventory;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.HashMap;
+
+public class SmeltingTracker {
+
+    private HashMap<Furnace, OfflinePlayer> furnaceOwners;
+
+    public SmeltingTracker() {
+        furnaceOwners = new HashMap<>();
+    }
+
+    private void changeFurnaceOwnership(Furnace furnace, Player player) {
+        furnaceOwners.put(furnace, player);
+    }
+
+    @Nullable
+    public Furnace getFurnaceFromInventory(Inventory inventory) {
+        if (!(inventory instanceof FurnaceInventory)) {
+            return null;
+        }
+
+        return (Furnace) inventory.getHolder();
+    }
+
+    @Nullable
+    public OfflinePlayer getPlayerFromFurnace(Furnace furnace) {
+        return furnaceOwners.get(furnace);
+    }
+
+    public boolean isFurnaceOwned(Furnace furnace) {
+        return furnaceOwners.get(furnace) != null;
+    }
+
+    public void removeFurnaceOwner(Furnace furnace) {
+        furnaceOwners.remove(furnace);
+    }
+
+    public void processFurnaceOwnership(Furnace furnace, Player player) {
+        if(!Permissions.skillEnabled(player, PrimarySkillType.SMELTING))
+            return;
+
+        //If the player is legally allowed to break the block then they can steal ownership
+        if(EventUtils.simulateBlockBreak(furnace.getBlock(), player, true)) {
+            changeFurnaceOwnership(furnace, player);
+        }
+    }
+
+    public void untrackFurnace(Furnace furnace) {
+        furnaceOwners.remove(furnace);
+    }
+}